城市污水再生利用城市雜用水水質(zhì)gbt18920--資料下載頁
2024-10-25 16:50本頁面
【導(dǎo)讀】為貫徹我國水污染防治和水資源開發(fā)方針，提高水利真是用率、做好城市節(jié)約用水工作，可持續(xù)發(fā)展，制定《城市污水再生利用》系列標準。本標準為第二項。本標準主要變化如下：。水質(zhì)類別由2個增加到5個；水質(zhì)指標值進行了相應(yīng)調(diào)整。本標準自實施之日起，CJ/T48——1999同時廢止。本標準由中華人民共和國建設(shè)部提出。本標準由建設(shè)部給水排水產(chǎn)品標準化技術(shù)委員會歸口。本標準規(guī)定了城市雜用城市雜用水規(guī)定了城市雜用水水質(zhì)標準、采樣及分析方法。本標準適用于廁所便器沖洗、道路清掃、消防、城市綠化、車輛沖洗、建筑施工雜用水。下列文件中的條款通過本標準的引用而成為本標準的條款。準達成協(xié)議的各方研究是否可使用這些文件的最新版本。樣品的保管按GB/T12999規(guī)定。本標準由縣級以上人民政府城巾雜用水行政主管部門及相關(guān)部門負責(zé)統(tǒng)一監(jiān)督檢查執(zhí)行情況。Servlet被服務(wù)器實例化后，容器運行其init方法，請求到達時運行其service方法，service方法自動派遣運行與請求對應(yīng)的doXXX方法（
【正文】 執(zhí)行這個 method。換言之，很可能數(shù)個使用者在執(zhí)行某個 Stateless Session Bean 的 methods 時，會是同一個 Bean 的 Instance 在執(zhí)行。從內(nèi)存方面來看， Stateful Session Bean 與 Stateless Session Bean 比較， Stateful Session Bean 會消耗 J2EE Server 較多的內(nèi)存，然而 Stateful Session Bean 的優(yōu)勢卻在于他可以維持使用者的狀態(tài)。 The Inter’s rise has been nothing short of meteoric. We may take it for granted today, using it for all manner of tasks, but just over ten years ago few people had even heard of the Inter, let alone used it. For businesses and individuals, the Inter is no w often the munication medium of choice, enabling them to interact with the world. But the Inter’s origins were more ominous and rather different from the evergrowing, sprawling freeforall that exists in the 1960s, the American military was experimenting with methods by which the . authorities might be able to municate in the aftermath of a nuclear attack. The suggested solution was to replace pointto point munication works like the telephone with a system that was more robust. They decided to create a work and to send packets of data from one node of the work to the other in a sort of relay race. This meant that information could find its way from place to placeeven if certain sections of the work were destroyed.
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